Corona renderer Alpha is a new free
rendering plugin for Cinema 4D until
1st of july 2015. You can
use free version also for commercial projects
during alpha stage.
The quality is close to vrayforc4d
but the render settings has less tweaking
options which is actually good because
you will save lot of time. Almost only
thing you have to take care is to create
Corona materials and lights from plugins
menu. Corona material is located in
shaders menu and default Cinema 4D “mat”
is not compatible with the Corona renderer.

I have my answer ready whenever someone asks me if I think that my Three Laws of Robotics will actually be used to govern the behavior of robots, once they become versatile and flexible enough to able to choose among different courses of behavior.

My answer is, “Yes, the Three Laws are the only way in which rational human beings can deal with robots—or with anything else.”

—But when I say that, I always remember (sadly) that human beings are not always rational.

I opened my model and noticed there´s a lot of unnecessary geometry that
needs to be optimized. I modeled a mech model for challenge and there´s
no limit of polygon amount when you do a model just for rendering purpose.
However if you want to use the same model with same geometry in game engine
like Unity then geometry the model needs to be cleaned up and polygon amount needs to be reduced.

Polygons anyone?

Tip: How to get rid of too many polygons?

There´s many ways and you can try with less subdivisions
or use polygon reduction tool.
This depends also of your geometry but if you use box modeling
with too many edges as I did because it did not matter in
rendered model.
For example the bottom middle part (the mechs ass) has
too many vertical edges. So I wanted to start cleaning
up because this was the most obvious detail to start with.
In this case Melt function is best and fastest
way to clean up your mesh.

What is melt?

Melt is a polygon modeling tool that melts edges.
For example this mech has way too much polygons to be used
as a game model so for example the bottom part of mech
has way too many vertical cuts.

1. select edges with loop selection (shift to add more edges).

2. Convert selection. Now let´s convert edge selection to points.
This is important step because you have to be able to delete the points after
Melt function.

3. Now go back to edge mode and select melt.
You will notice the edges are gone but your points are still hanging out there without any purpose.

4. Go back to points mode and just delete the points. Now you have much less geometry.